Ink-eraser



(No Model.)

R. M. SWINBURNE.

INK ERASER. No. 365,551. PatntedJune 28, 1887.,

WITNESSES: INVENTOR:

465% 5 5 BY /aw m@ V ATTORNEYS.

UNITED STATES PATENT OFFICE.

RICHARD M. SWINBURNE, OF LA GROSSE, WISCONSIN.

INK-ERASER.

SPECIFICATION forming part of Letters Patent no. 365,551, dated June 28,- 1887.

Application filed Februaryll, 1887. Serial No. 228,367. (Nomodeh) To aZZ whom it may concern.-

Be it known that I, RICHARD MONROE SWIN- BURNE, of La Crosse, in the county of La Crosse and State of Wisconsin, have invented a new and Improved InlcEraser, of which the following is a full, clear, and exact descrip tion.

My invention relates to a novel form of inkeraser, the object of the' invention being to provide an ink-erasing pencil or wafer that shall be simple, cheap, and durable, and which may be used, in the manner hereinafter described, by unskilled persons; and to these ends the invention consists of a fibrous holding-b0dy that is preferably rolled to the form of a pencil, said body being charged with citric acid, all as will be hereinafter more fully described, and specifically pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a partof this specification, in which similar figures of reference indicate corresponding parts in both the views. 7

Figure l is a perspective view ofan inkerasing pencil constructed in accordance with the terms of my. invention; and Fig. 2 is an enlarged cross sectional view, the view being taken on line a: w of Fig. 1.

In constructing such an ink eraser as the one forming the subject-matterof this application, Ifill a proper receptacle, preferably a porcelain-lined kettle, with citric-acid crystals, adding sufficient water to dissolve when the contents of the receptacle are subjected to the action of heat. After the crystals have been dissolved, the fibrous material, which is to constitute the main body of the ink-eraser, is dipped in the hot acid solution, and then rolled into the form of a pencil or cut into the form of a wafer.

V In Fig. 1 I represent a pencil formed as above described, in which 10 represents the saturated fibrous material, and 11 a wrapping of any proper material, as paper or a textile fabric; or the surface of the fibrous material might be coated with enamel or shellac.

In using the fibrous material socharged with acid, as above described, the material is moistened by applying to the tonguelor dipping into water, and is then rubbed upon the part to be erased, after which a drop of water charged with chloride of lime is applied to the part, when it. will be found that the ink that it is desired to erase will instantly disappear, all excess of moisture being absorbed by clear, dry blotting-paper. I

The strength of the acid solution may be varied as may be desired, and by applying said solution through the medium of a fibrous holding-body, as described, all danger of injnring the paper by abrasion is avoided, it

being understood that the fibrous holding-bod y referred to is blotting paper or any other analogous substance.

Having thus'fully described my' invention, I claim as new and desire to secure by Letters Patent- 1. An ink-eraser consisting, essentially, of a fibrous holding-body charged with citric acid, substantially as described.

2. An ink-eraser consisting, essentially, of a fibrous holding-body charged with citric acid and rolled to pencil form, substantially as described.

3. An ink-eraser consisting, essentially, of a fibrous holding-body charged with citric acid, rolled to pencil form, and provided with a cover that is applied to its peripheral face, substantially as described.

RICHARD M. SlVINBURNE. 

